Process of making nitrogen and carbon dioxid.



R. H. BROWNLEE & R. H. UHLINGER. PROCESS OF MAKING NITROGEN AND CARBON APPLICATION F|LED AUG. 18, I913.

Patented Aug. 17, 1915.

JNVENTORS WITNESSES OY H. UHLING-ER, OF PITTSBURGH, PENNSYLVANIA, ASSIGNMENTS, TO AMERICAN NITRO-PROPUCTS COM- OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF DELAWARE.

PROCESS OF MAKING NITROGEN AND CARBON DIOXID.

Original application filed April 7, 1913, Serial No. 759,381.

Specification of Letters Patent.

Patented Aug. 11?, 1915. Divided and this application filed August 18,

1913. Serial No. 785,342.

To all whom it may concern Be it known that we, ROY H. BROWNLEE and ROY H UHLINGER, citizens of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Processes of Making Nitrogen and Carbon Dioxid, of which the following is a specification.

ur invention consists of an improved method or process of making nitrogen and carbon dioxid by utilizing the products of combustion of internal combustion or explosion engines, whereby to produce nitrogen and carbon dioxid as bi-products of the original fuel, in the manner more fully hereinafter described.

The present application is a division of our original application for process of making nitrogen and carbon dioxid, filed Apr. 7, 1913, Serial No. 759881.

While the process of the carried out in connection with various designs of mechanism, it will be rendered clear by reference to the accompanying diagrammatic drawing, showing the principal elements employed.

In practising the process-any suitablefuel is use as natural gas, producer gas, water gas, coal gas or other carbonaceous gas'or volatilizable oil or other suitable carbonaceous substance or hydro-carbon and is first mixed with a suitable amount of air, then compressed, and exploded in the explosion chamber or. chambers of an internal combustion gas or oil engine, for the production of power, in a well-known manner.

The explosive mixture as supplied to the engine is so proportioned as to its air content, that when combustion has occurred, therewill be left in the resulting products of combustion a minimum excess of oxygen and combustible gases. This may be readily effected by adjustment of the mixer. In case, however, that the usual excess of air is admixed with the gas or oil vapor of the hydro-carbon toeffect complete combustion, as in the ordinary use of gas engines for the best results as to power, a sufiicient quantity of additional reducing products of combustion from the engine. Complete combustion of the resulting mixture is then brought about by bringing it invention may be gas is supplied to the sorptlon towers wherein the carbon dioxid 1 is absorbed for maklng chemical compounds. a means for separating the gas from the nitrogen as, for instance, by passing through towers containing calcium oxid and hydroxid (as lime) from which practically pure carbon dioxid may be recovered by heating, or as a step in the manufacture of useful carbonates.

By the above treatmentsor series of steps practically pure'nitrogen is produced as the remaining product, and may be utilized in any desired manner.

Referring to the diagrammatic drawing, Figure 1, 2 is an internal combustion engine to which the explosive mixture in suitable proportions is supplied in the usual manner from a mixer 3. The products of combustion pass by Waste or exhaust pipe 4, a branch pipe 5 furnishing additional reducmixture passing by pipe or conduit 6 to chamber 7 containing refractory material 8, inthe form of broken brick, checker-Work, etc. through which the gases pass, effecting complete combustion. The resulting carbon dioxid and nitrogen pass from chamber 7 by conduit 9 to one or more chambers or towers 10 Where the carbon dioxid is absorbed, as described.

What we claim is:

1. The process of making carbon dioxid and nitrogen consisting in adding fuel to the products of combustion of a suitable carbonaceous substance and effecting combustion of the mixture by passing it through an inclosed mass of highly heated refractory material to produce a maximum amount of carbon dioxid, and then passing the resulting gases through an inclosed absorbing medium to absorb and thereby separate the carbon dioxid and release therefrom free nitrogen.

2. The process of making carbon dioxid and nitrogen consisting in adding fuel to the products of combustion of an internal explosion engine and effecting combustion of the mixture by passing it through an inour signatures in the presence 01 two witcloseil mass 3f highly heated refractoq manesses. 1 teria to ro uce a maximum amount 0 car- .bon dioz d, and then passing the resulting gases through an inclosed absorbing medium to absorb and thereby separate the carbon Witnesses: dioxid and release therefrom free nitrogen, C. M. CLARKE, In testimofiy whereof we hereunto afiix FREDK STAUB. 

